Thanks for your kind reminder, I am facing this problem with Kucoin. After a long time when I log in at Kucoin exchange and want to do trade, they asked me for Trading Password. Unfortunately, I have forgotten it and want to reset it. But kucoin asked me to do submit KYC DOCUMENT for this!! There is no other option to recover the trading password, So I need to submit KYC Document If I want to use the Kucoin exchange.
Do you still have access to your account though? If so, you can try to email them and tell them you're not willing to give your documents away. I did that they ended up asking for some screenshots for the trading, deposit, and withdrawal history page (which make no sense obviously).